Charging method, vehicle-mounted charger, charging system and electric motorcycle

Abstract

The invention provides a charging method, a vehicle-mounted charger, a charging system and an electric motorcycle. The charging method comprises the steps that when a first vehicle-mounted charger receives an awakening instruction, inquiry information is issued to a second vehicle-mounted charger, and when the second vehicle-mounted charger receives the inquiry information issued by the first vehicle-mounted charger, first feedback information is sent to the first vehicle-mounted charger; when the first vehicle-mounted charger receives the first feedback information, the number of online second vehicle-mounted chargers is determined; the first vehicle-mounted charger determines first charging power and second charging power according to the number; the first vehicle-mounted charger outputs according to the first charging power and issues a distribution instruction to each online second vehicle-mounted charger, and the second vehicle-mounted chargers output according to the distribution instruction. Flexible installation is achieved, the space requirement for installing the vehicle-mounted charger on the vehicle is lowered, the charging efficiency of the vehicle-mounted charger is improved, and the charging safety of the vehicle is guaranteed.

Description

Technical Field

[0001] This application relates to the field of vehicle charging technology, specifically to a charging method, an on-board charger, a charging system, and an electric motorcycle. Background Technology

[0002] With the continuous development of transportation technology, electric motorcycles are widely used due to their advantages such as energy saving, environmental protection, and low operating costs. However, during the charging process, if a higher-power on-board charger (OBC) is desired, these OBCs often require water cooling for the entire vehicle and a dedicated platform, resulting in a larger size. While users can retrofit the same OBC for higher-power charging needs, the inability of vehicles to recognize different OBC IDs can easily lead to charging malfunctions. Furthermore, while DC charging stations can accelerate the charging speed, they have limitations on battery voltage levels and are incompatible with low-voltage batteries, thus affecting the charging performance of the electric motorcycle. Summary of the Invention

[0003] To address at least one of the aforementioned problems, this application provides a charging method, an on-board charger, a charging system, and an electric motorcycle, which facilitates flexible installation of the on-board charger and improves the vehicle's charging rate.

[0004] This application provides a charging method for a first on-board charger. The first on-board charger is used to establish a first communication connection with at least one second on-board charger. The method includes: when the first on-board charger receives a wake-up command, it sends an inquiry message to a second on-board charger; when the second on-board charger receives the inquiry message from the first on-board charger, it sends first feedback information to the first on-board charger; when the first on-board charger receives the first feedback information, it determines the number of online second on-board chargers based on the received first feedback information; the first on-board charger determines a first charging power and a second charging power based on the number, wherein the first charging power is the target charging power of the first on-board charger, and the second charging power is the target charging power of the second on-board charger; the first on-board charger outputs according to the first charging power and sends an allocation command to each online second on-board charger, the allocation command including the second charging power, and the second on-board charger outputs according to the allocation command.

[0005] In one embodiment, the first on-board charger also establishes a second communication connection with the vehicle control unit (VCU) to obtain charging information output by the VCU. Determining the first charging power and the second charging power based on the quantity includes: determining the required power based on the charging information; and determining the first charging power and the second charging power based on the quantity and the required power.

[0006] In one embodiment, the charging information includes an initial charging power. Determining the required power based on the charging information includes: obtaining a first charging power upper limit value, a second charging power upper limit value, and a third charging power upper limit value. The first charging power upper limit value is the upper limit value of the output power of the charging pile connected to the first on-board charger and the second on-board charger. The second charging power upper limit value is the upper limit value of the output power of the charging cable of the first on-board charger and the second on-board charger. The third charging power upper limit value is the sum of the upper limit values ​​of the charging power of the first on-board charger and the second on-board charger.

[0007] In one embodiment, determining the required power based on charging information includes: selecting the minimum value among the initial charging power, the first upper limit of charging power, the second upper limit of charging power, and the third upper limit of charging power as the required power.

[0008] In one embodiment, the method further includes: if the first on-board charger does not receive the first feedback information within a first preset time period after sending the inquiry information, it determines the first charging power based on the required power. The first preset time period is preset by relevant technical personnel.

[0009] In one embodiment, the method further includes: determining a first charging power and a second charging power based on the quantity and the required power, including: using the average value obtained by dividing the required power by the total quantity as the first charging power and the second charging power, where the total quantity is the value obtained by adding 1 to the quantity.

[0010] In one embodiment, the method further includes: when the first on-board charger receives second feedback information periodically reported by each second on-board charger, confirming that the corresponding second on-board charger is online.

[0011] In one embodiment, the method further includes: when the first on-board charger does not receive the second feedback information within a second preset time period after issuing a control command or receiving the second feedback information, determining that the corresponding second on-board charger is offline; updating the number of second on-board chargers; and returning to the step of determining the first charging power and the second charging power based on the number.

[0012] A second aspect of this application provides an on-board charger, which includes a controller for performing any charging method.

[0013] The third aspect of this application provides a charging system for use in a vehicle, the charging system including a vehicle controller and an on-board charger provided in the second aspect of this application, the vehicle controller being electrically connected to the on-board charger.

[0014] A fourth aspect of this application provides an electric motorcycle, comprising: a frame, a body panel, a wheel assembly, a power system, and a charging system. The body panel is at least partially disposed on the frame. The wheel assembly includes a front wheel and a rear wheel disposed below the frame. The power system is disposed on the frame and is drive-connected to at least one of the front and rear wheels. The power system provides power to the electric motorcycle and includes a motor and a power battery. The charging system is disposed on the frame or the body panel. The charging system includes at least a first on-board charger, which is configured to establish a first communication connection with at least one second on-board charger. The first on-board charger is further configured to: when the first on-board charger receives a wake-up command, charge the second on-board charger... The first on-board charger sends an inquiry message. When the second on-board charger receives the inquiry message from the first on-board charger, it sends a first feedback message to the first on-board charger. Upon receiving the first feedback message, the first on-board charger determines the number of online second on-board chargers. Based on the number, the first on-board charger determines a first charging power and a second charging power, where the first charging power is the target charging power of the first on-board charger, and the second charging power is the target charging power of the second on-board charger. The first on-board charger outputs according to the first charging power and sends a distribution instruction to each online second on-board charger. The distribution instruction includes the second charging power, and the second on-board charger outputs according to the distribution instruction.

[0015] The technical solution of this application has at least the following technical effects or advantages:

[0016] The charging method provided in this application involves a first on-board charger sending an inquiry message upon receiving a wake-up command. Then, based on the received first feedback information, the number of online second on-board chargers is determined. Finally, based on the number of online second on-board chargers and their required power, the charging power of the first on-board charger and the second charging power of the second on-board chargers are determined, thereby enabling simultaneous charging by the first on-board charger and at least one second on-board charger. Thus, the charging method provided in this application effectively improves charging efficiency and allows for flexible installation of on-board chargers to meet higher charging power demands. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an electric motorcycle provided in one embodiment of this application.

[0018] Figure 2 This is a schematic diagram of a charging system provided in one embodiment of this application.

[0019] Figure 3 This is a schematic flowchart of a charging method provided in an embodiment of this application.

[0020] Figure 4 This is an overall interactive flowchart of a charging method for an electric motorcycle provided in an embodiment of this application.

[0021] Figure 5 This is a structural block diagram of an on-board charger provided in one embodiment of this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] Next, a charging method, on-board charger, charging system, and electric motorcycle provided in the embodiments of this application will be further described. It is understood that the charging method provided in this application can be applied to vehicles; in the following embodiments, an electric motorcycle is used as an example.

[0027] Please see Figure 1 This illustration shows a schematic diagram of an electric motorcycle provided in an embodiment of this application, such as... Figure 1As shown, the electric motorcycle 10 includes: a frame 101, a body panel 102, a wheel assembly 103, and a power system 104. The body panel 102 is mounted on the frame 101. The wheel assembly 103 includes a front wheel 103A and a rear wheel 103B, which are located below the frame 101. Specifically, the front wheel 103A and the rear wheel 103B can be connected to the frame 101 via a suspension 105, thereby enabling the entire electric motorcycle 10 to move.

[0028] The power system 104 is mounted on the frame 101 and is connected to at least one of the front wheel 103A and the rear wheel 103B via a transmission. The power system 104 provides power to the electric motorcycle 10 and includes an electric motor. Figure 2 (not shown in the image) and power battery 104A (see...) Figure 2 The power battery 104A connects to the motor and supplies power to it, enabling the motor to operate and drive the front wheel 103A and / or the rear wheel 103B, which are connected in a transmission connection, to rotate. The power battery 104A includes a battery ( Figure 2 (not shown in the image) and battery management system 1041A (see [reference]). Figure 2 The battery management system 1041A is used to monitor battery status.

[0029] like Figure 2 As shown, the electric motorcycle 10 provided in this application embodiment also includes a charging system 106. The charging system 106 is disposed on the frame 101 or the body cover 102; the charging system 106 is connected to the power battery 104A, thereby charging the power battery 104A.

[0030] Specifically, the charging system 106 includes a charging interface 1063, a first on-board charger 1061, a second on-board charger 1062, and a vehicle controller 1064 connected in sequence. The charging interface 1063 allows a charging device 20 to be inserted to receive electrical energy. The charging device 20 can be an AC charging pile or a DC charging pile. The charging device 20 can output current from the power grid (e.g., mains power grid or other power distribution system) to the charging interface 1063, and the current is transmitted through the charging interface 1063 to the charging cable. Figure 2 (Not shown) The on-board charger (including the first on-board charger 1061 and the second on-board charger 1062) charges the power battery 104A.

[0031] The first on-board charger 1061 and the second on-board charger 1062 are used to realize power conversion between the charging device 20 and the electric motorcycle 10. For example, the first on-board charger 1061 and the second on-board charger 1062 can be used to convert the AC power input to the charging device 20 into DC power, and / or the first on-board charger 1061 and the second on-board charger 1062 can be used to convert the DC power input to the charging device 20 into DC power with a preset power value. In this embodiment, the first on-board charger 1061 is used to establish a first communication connection with at least one second on-board charger 1062 to form an internal controller local area network. In the first communication system, the first on-board charger 1061, as the host, is also loaded with a corresponding control program to receive information reported by each second on-board charger 1062 and realize coordinated control of multiple on-board chargers in the charging system 106.

[0032] In some embodiments, the first on-board charger 1061 and the second on-board charger 1062 can be determined by the user. For example, the user can switch between all on-board chargers using a dial switch with a dial function provided on the on-board charger. When the dial switch is set to 0, the corresponding on-board charger is configured as the first on-board charger 1061; when the dial switch is set to 1, the corresponding on-board charger is configured as the second on-board charger 1062. When only one on-board charger exists in the charging system, that on-board charger is the first on-board charger 1061, and the user sets the corresponding dial switch to 0. In other embodiments, the first on-board charger 1061 and the second on-board charger 1062 can also be configured automatically by multiple on-board chargers through communication within an internal controller area network.

[0033] In some embodiments, the first on-board charger 1061 acts as a host and can establish a communication connection with the second on-board charger 1062 via a Controller Area Network (CAN) to exchange information and control the second on-board charger 1062. Understandably, in other embodiments, the first on-board charger 1061 can also establish a first communication connection with each of the second on-board chargers 1062 via other communication methods. These other communication methods can be wired communication, such as wired communication based on an RS485 bus; or wireless communication, such as Bluetooth, Wi-Fi, ZigBee, etc. This application does not limit the specific method of establishing the first communication connection.

[0034] The vehicle controller 1064 is used to monitor various parameters of the charging system 106 during the charging process to ensure charging safety. In some embodiments, the vehicle controller 1064 is also used to centrally control the vehicle's power supply equipment, drive equipment, body equipment, etc., coordinate the operation of various control systems, and provide monitoring and detection functions. For example, the vehicle controller 1064 can communicate with the battery management system 1041A in the power supply equipment to control the power battery 104.

[0035] Understandable. Figure 1 and Figure 2 The schematic structure does not constitute a specific limitation on the electric motorcycle 10. The electric motorcycle 10 may include more or fewer parts than shown, or combine some parts, or separate some parts, or have different arrangements of parts.

[0036] Please see Figure 3 , Figure 3 A charging method is provided according to an embodiment of this application. This method can be applied to a first on-board charger 1061 and is executed by the controller of the first on-board charger 1061. The method includes the following steps:

[0037] Step S1: When the first on-board charger 1061 receives the wake-up command, it sends an inquiry message to the second on-board charger 1062.

[0038] Step S2: When the second on-board charger 1062 receives the query information sent by the first on-board charger 1061, it sends the first feedback information to the first on-board charger 1061.

[0039] In at least one embodiment of this application, the wake-up command can be an electrical signal triggered when the charging gun of the charging device 20 is inserted into the charging interface 1063 of the electric motorcycle 10. For example, the charging interface 1063 is equipped with a detection module ( Figure 2 (Not shown). The detection module can output a first-level signal to the first on-board charger 1061 when it detects that a charging gun is inserted into the charging interface 1063. For example, when a charging gun is inserted into the charging interface 1063, a first-level signal can be automatically output, such as a high-level signal. This application does not limit the specific signal form or source of the wake-up command.

[0040] Understandably, the first on-board charger 1061 is woken up upon receiving a wake-up command and first performs a self-test. When the first on-board charger 1061 passes the self-test, it sends an inquiry message to request feedback from each of the second on-board chargers 1062.

[0041] Step S3: When the first on-board charger 1061 receives the first feedback information, it determines the number of online second on-board chargers 1062 based on the received first feedback information.

[0042] In some embodiments, upon receiving a wake-up command, each of the second on-board chargers 1062 in the charging system 106 is also woken up. Thus, upon receiving an inquiry message from the first on-board charger 1061, each second on-board charger 1062 reports first feedback information to the first on-board charger 1061. Therefore, upon receiving the first feedback information, the controller of the first on-board charger 1061 can confirm that the corresponding second on-board charger 1062 is online.

[0043] In some embodiments, the controller of the first on-board charger 1061 can determine the number of online second on-board chargers 1062 based on the number of first feedback messages received within a preset time period.

[0044] In some embodiments, the first feedback information may include the address of the corresponding second on-board charger 1062. Thus, after receiving the first feedback information, the first on-board charger 1061 can interact with the corresponding second on-board charger 1062.

[0045] Step S4: The first on-board charger 1061 determines the first charging power and the second charging power according to the quantity, wherein the first charging power is the target charging power of the first on-board charger 1061 and the second charging power is the target charging power of the second on-board charger 1062.

[0046] The target charging power refers to the ideal value of the charging power output by the corresponding on-board charger to the power battery 104. The first on-board charger also establishes a second communication connection with the vehicle control unit (VCU) to obtain charging information output by the VCU, and determines the required power based on this information. The required power refers to the power required when the power battery 104 is charging. Understandably, the sum of the first charging power and all second charging powers equals the required power.

[0047] In at least one embodiment of this application, determining the first charging power and the second charging power based on the quantity includes: using the average value obtained by dividing the required power by the total quantity as the first charging power and the second charging power, where the total quantity is the quantity plus 1. In this case, the first charging power and the second charging power are equal.

[0048] For example, at the start of charging, the first on-board charger 1061 determines that there are 4 second on-board chargers 1062, all of which are online. If the required power is 2kW, the first on-board charger 1061 calculates the first charging power and the second charging power as 400W.

[0049] During charging, if the first on-board charger 1061 receives only three reply messages from the second on-board charger 1062, it determines that the number of second on-board chargers 1062 in an online state is 3. At this time, the first on-board charger 1061 calculates the first charging power and the second charging power to be 500W. If the first on-board charger 1061 does not receive a reply, it determines the first charging power based on the required power. For example, when the required power is greater than the upper limit of the charging power of the first on-board charger 1061, the first charging power of the first on-board charger 1061 is configured to be the upper limit, so that the first on-board charger 1061 outputs full power. When the required power is less than or equal to the upper limit of the charging power of the first on-board charger 1061, the first charging power is determined to be the required power.

[0050] This application does not limit the specific method for determining the first charging power and the second charging power in step S3. For example, in other embodiments, when the maximum charging power of each on-board charger in the charging system 106 is different, different charging powers can be allocated to the corresponding on-board chargers according to the maximum charging power of each on-board charger.

[0051] Step S5: The first on-board charger 1061 outputs according to the first charging power and sends a distribution instruction to each online second on-board charger 1062. The distribution instruction includes the second charging power, and the second on-board charger 1062 outputs according to the distribution instruction.

[0052] Understandably, when the controller of the first on-board charger 1061 sends the same allocation command to each of the second on-board chargers 1062 via the internal controller local area network, the allocation command includes the address code of each second on-board charger 1062 and the corresponding charging power; that is, at this time, the allocation command includes the second charging power. At this time, each second on-board charger 1062 can decode the received allocation command according to the corresponding address code to obtain the corresponding second charging power.

[0053] Thus, after executing step S4, each on-board charger can charge the power battery according to the corresponding charging power, enabling multiple on-board chargers to charge the power battery 104 simultaneously, effectively improving charging efficiency.

[0054] In summary, the charging method provided in this application involves a first on-board charger sending an inquiry message upon receiving a wake-up command; then, based on the received first feedback information, determining the number of online second on-board chargers, and determining the first charging power of the first on-board charger and the second charging power of the second on-board charger based on the number of online second on-board chargers. This allows for simultaneous charging by the first on-board charger and at least one second on-board charger. Thus, the charging method provided in this application effectively improves charging efficiency and allows for flexible installation of on-board chargers in fragmented spaces within the vehicle body, reducing the space requirements for on-board charger installation, improving space utilization, and facilitating later installation by users to meet higher charging power demands.

[0055] In some embodiments, the first on-board charger 1061 also establishes a second communication connection with the vehicle controller 1064 to form an external controller area network. In some embodiments, the first on-board charger 1061 can establish a communication connection with the vehicle controller 1064 via a controller area network (CAN) to achieve information exchange between the two. Understandably, in other embodiments, the first on-board charger 1061 can also establish a second communication connection with the vehicle controller 1064 via other communication methods, such as wired or wireless communication, and this application does not limit this.

[0056] In some embodiments, before performing step S3, the charging method further includes:

[0057] Step S31: The first on-board charger 1061 acquires the charging information output by the vehicle controller 1064.

[0058] In at least one embodiment of this application, the first on-board charger 1061 communicates with the vehicle controller 1064 via an external controller local area network to obtain charging information of the electric motorcycle. The charging information may include the charging power required by the power battery 104, charging current limits, and charging voltage limits, etc.

[0059] In some embodiments, the vehicle controller 1064 also communicates with the battery management system 1041A (BMS). After the first on-board charger 1061 is woken up, it outputs a wake-up signal to the vehicle controller 1064 via an external controller area network to wake up the vehicle controller 1064. After being woken up, the vehicle controller 1064 performs a self-test and, upon passing the self-test, sends a charging request to the battery management system 1041A. The charging request is used to determine whether charging is permitted. The vehicle controller 1064 receives a response to the charging request from the battery management system 1041A, the response including confirmation that charging is permitted and the corresponding power value. Then, the vehicle controller 1064 outputs charging information to the first on-board charger 1061 based on the response information.

[0060] In some embodiments, the vehicle controller 1064 can obtain the charging current limit value and the charging voltage limit value of the power battery 104, and then determine the charging power that can ensure charging safety based on the charging current limit value, the charging voltage limit value and the corresponding power value, and package the charging power into charging information and send it to the first on-board charger 1061.

[0061] Step S32: The first on-board charger 1061 determines the required power based on the charging information.

[0062] Understandably, when charging the power battery 104, any node in the charging circuit from the charging device 20 to the power battery 104 may limit the actual charging power due to power limitations. Therefore, to ensure charging safety, after obtaining the charging information, the first on-board charger 1061 can determine the final required power based on various power limitation information, and then allocate charging power to each on-board charger according to the charging power. In this way, by executing step S32, the safety of each on-board charger when charging the power battery can be guaranteed. In at least one embodiment of this application, the charging information includes the initial charging power. The initial charging power can be output by the battery management system 1041A to the vehicle controller 1064 to determine the charging power required by the vehicle battery.

[0063] In some embodiments, the charging information includes the initial charging power. The initial charging power can be confirmed by the vehicle controller 1064 based on the response information output by the battery management system 1041A. That is, the initial charging power is the charging power that the vehicle controller 1064 determines to ensure charging safety.

[0064] In some embodiments, determining the required power based on charging information includes: obtaining a first charging power upper limit value, a second charging power upper limit value, and a third charging power upper limit value. The first charging power upper limit value is the upper limit value of the output power of the charging pile connected to the first on-board charger 1061 and the second on-board charger 1062. The second charging power upper limit value is the upper limit value of the output power of the charging cable connected to the charging interface 1063 by the first on-board charger 1061 and the second on-board charger 1062. The third charging power upper limit value is the sum of the upper limit values ​​of the charging power of the first on-board charger 1061 and each of the second on-board chargers 1062.

[0065] Select the minimum value among the initial charging power, the first upper limit of charging power, the second upper limit of charging power, and the third upper limit of charging power as the required power.

[0066] This ensures charging safety.

[0067] In at least one embodiment of this application, the method further includes:

[0068] If the first on-board charger 1061 does not receive the first feedback information within a first preset time after sending the inquiry information, it determines the first charging power based on the required power.

[0069] The first preset duration is set in advance by relevant technical personnel. This application does not limit the specific duration of the first preset duration.

[0070] Understandably, if the first on-board charger 1061 does not receive the first feedback information within a first preset time after sending the query information, it can be determined that only the first on-board charger 1061 exists in the charging system.

[0071] For example, when the charging gun is inserted, the first preset time is set to 10 seconds. The first on-board charger 1061 initiates communication through the internal controller local area network. When the first on-board charger 1061 receives a message reply from the second on-board charger 1062 within 10 seconds, it is determined that the corresponding second on-board charger 1062 is online. Conversely, if no first feedback information is received within the first preset time after the query information is sent, the first on-board charger 1061 determines the first charging power according to the required power. When the required power is less than or equal to the upper limit of the charging power of the first on-board charger 1061, it can be determined that the first charging power is equal to the required power, so as to control the first on-board charger 1061 to output full power.

[0072] In at least one embodiment of this application, the method further includes:

[0073] When the first on-board charger 1061 receives the second feedback information periodically reported by each second on-board charger, it confirms that the corresponding second on-board charger is online.

[0074] In this way, the status of the second on-board charger 1062 can be confirmed in real time by receiving the second feedback information periodically reported by the second on-board charger 1062.

[0075] In one embodiment, the second feedback information includes the charging current and charging voltage of the corresponding second on-board charger 1062 when charging the power battery 104. Thus, the first on-board charger 1061, acting as the host, can collect relevant parameters from each on-board charger in the charging system 106 during charging.

[0076] In at least one embodiment of this application, the method further includes:

[0077] When the first on-board charger 1061 does not receive the second feedback information within a second preset time period after issuing the allocation instruction or receiving the second feedback information, it is determined that the corresponding second on-board charger is in an offline state.

[0078] Update the number of online second on-board chargers;

[0079] Return to the step of determining the first charging power and the second charging power based on the quantity.

[0080] Understandably, during the charging process of the power battery, when the first on-board charger 1061 periodically receives the second feedback information, it determines that the second on-board charger 1062 corresponding to the output of the second feedback information is online. In this way, the number of online second on-board chargers 1062 can be updated and adjusted, thereby adjusting the charging power of each on-board charger.

[0081] Please see Figure 4 This diagram illustrates the overall interactive flowchart of a charging method for an electric motorcycle 10 provided in an embodiment of this application. The charging method includes:

[0082] Step S601: After the plug-in gun is detected, the first on-board charger wakes up and performs a self-test. At the same time, it sends an inquiry message through the internal CAN and a wake-up signal through the external CAN to the VCU.

[0083] Specifically, internal CAN refers to the internal controller area network, external CAN refers to the external controller area network, and VCU refers to the vehicle controller.

[0084] Step S602: After the plug-in gun is detected, the second on-board charger is woken up;

[0085] Step S603: After receiving the wake-up signal, the VCU performs a wake-up self-test and sends a charging request to the BMS.

[0086] Specifically, BMS stands for Battery Management System.

[0087] Step S604: The BMS sends a response message to the VCU, the response message including confirmation that charging is allowed and the corresponding power value for charging.

[0088] Step S605: The VCU determines the initial charging power based on the charging current limit, the charging voltage limit, and the corresponding power value, and packages the initial charging power into charging information and sends it to the first on-board charger.

[0089] Step S606: Select the minimum value among the initial charging power, the first charging power upper limit, the second charging power upper limit, and the third charging power upper limit as the required power.

[0090] Specifically, the first charging power limit is the upper limit of the output power of the charging pile connected to the first and second on-board chargers, the second charging power limit is the upper limit of the output power of the charging cables of the first and second on-board chargers, and the third charging power limit is the sum of the charging power limits of the first and second on-board chargers.

[0091] Step S607: Determine the first charging power and the second charging power according to the quantity and required power. The first on-board charger outputs power to charge the power battery according to the first charging power and issues a distribution instruction to each online second on-board charger.

[0092] Step S608: The second on-board charger charges the power battery according to the second charging power output power, and periodically reports the second feedback information to the first on-board charger. The second feedback information includes the charging voltage and charging current of the corresponding second on-board charger.

[0093] Step S609: The first on-board charger charges the power battery according to the first charging power output power, and sends a CP signal to the charging equipment through the external CAN to provide feedback on the charging voltage and charging current of each on-board charger.

[0094] Specifically, the CP signal represents the Control Pilot Function (CP) for charging mode guidance; the CP signal is transmitted through the external controller local area network.

[0095] Step S610: Update the number of online second on-board chargers according to the second feedback information periodically reported by each second on-board charger, and redetermine the first charging power and the second charging power according to the updated number.

[0096] Step S611: The VCU continuously monitors the charging status until the charging device stops supplying power.

[0097] Step S612: When the charging gun is detected to be unplugged, the first on-board charger controls the electronic lock to disconnect, stops sending CP signals and stops receiving CC signals, disconnects the output relay, and updates the charging status.

[0098] Specifically, the CC signal represents the physical connection signal (Connector Control, CC) of the charging gun; the CC signal is transmitted through the local area network of the external controller.

[0099] Step S613: The output relay of the second on-board charger is disconnected, and the reporting of the second feedback information is stopped.

[0100] Step S614: Charging complete.

[0101] Step S615: Timed sleep mode.

[0102] Understandably, steps S601, S602, S603 and S607 can also be performed simultaneously.

[0103] Figure 4 The specific execution details of each step shown can be found above, and will not be repeated here.

[0104] Please see Figure 5 The illustration shows an embodiment of the present application providing an on-board charger 30, which includes a controller 31 for executing any charging method.

[0105] Understandably, the on-board charger 30 can serve as the first on-board charger 1061 to execute the charging method of any of the above embodiments. For specific implementation details, please refer to the above text, which will not be repeated here.

[0106] Please refer to it again. Figure 2 This application provides a charging system 106 for use in a vehicle. The charging system 106 includes a vehicle controller and an on-board charger, with the vehicle controller electrically connected to the on-board charger.

[0107] Please refer to it again. Figure 1 and Figure 2 An embodiment of this application also provides an electric motorcycle, comprising:

[0108] Frame;

[0109] Body panels, which are at least partially mounted on the vehicle frame;

[0110] Wheel assembly, including a front wheel and a rear wheel located under the frame;

[0111] The power system is mounted on the frame and is connected to at least one of the front and rear wheels. The power system is used to provide power to the electric motorcycle and includes an electric motor and a power battery.

[0112] The charging system is mounted on the vehicle frame or body panels.

[0113] The charging system includes at least a first on-board charger, which is used to establish a first communication connection with at least one second on-board charger, and the first on-board charger is also used for:

[0114] When the first on-board charger receives the wake-up command, it sends an inquiry message to the second on-board charger. When the second on-board charger receives the inquiry message from the first on-board charger, it sends a first feedback message to the first on-board charger.

[0115] Upon receiving the first feedback information, the first on-board charger determines the number of online second on-board chargers;

[0116] The first on-board charger determines the first charging power and the second charging power based on the quantity, wherein the first charging power is the target charging power of the first on-board charger and the second charging power is the target charging power of the second on-board charger.

[0117] The first on-board charger outputs a first charging power and issues a distribution command to each online second on-board charger. The distribution command includes a second charging power, and the second on-board charger outputs the power according to the distribution command. It should be noted that, for the foregoing method embodiments, for the sake of simplicity, they are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders or simultaneously.

[0118] The above embodiments are preferred embodiments of this application and are not intended to limit the scope of this application. Any modifications and improvements made by those skilled in the art to the technical solutions of this application without departing from the spirit of this application shall fall within the protection scope defined by the claims of this application.

Claims

1. A charging method applied to a first on-board charger, characterized in that, The first on-board charger is configured to establish a first communication connection with at least one second on-board charger, and the method comprises: When the first on-board charger receives the wake-up instruction, the first on-board charger sends inquiry information to the second on-board charger; When the second on-board charger receives the inquiry information sent by the first on-board charger, the second on-board charger sends first feedback information to the first on-board charger; When the first on-board charger receives the first feedback information, the first on-board charger determines the number of online second on-board chargers according to the received first feedback information; The first on-board charger determines a first charging power and a second charging power according to the number, wherein the first charging power is a target charging power of the first on-board charger, and the second charging power is a target charging power of the second on-board charger; The first on-board charger outputs according to the first charging power, and sends a distribution instruction to each online second on-board charger, wherein the distribution instruction comprises the second charging power, and each second on-board charger outputs according to the distribution instruction.

2. The charging method according to claim 1, wherein The first on-board charger also establishes a second communication connection with a vehicle controller to obtain charging information output by the vehicle controller, and the determination of the first charging power and the second charging power according to the number comprises: Determining the demand power according to the charging information; Determining the first charging power and the second charging power according to the number and the demand power.

3. The charging method according to claim 2, wherein The charging information comprises an initial charging power, and the determination of the demand power according to the charging information comprises: The first on-board charger obtains a first charging power upper limit value, a second charging power upper limit value, and a third charging power upper limit value, wherein the first charging power upper limit value is an output power upper limit value of a charging pile connected with the first on-board charger and the second on-board charger, the second charging power upper limit value is an output power upper limit value of a charging cable connected with the first on-board charger and the second on-board charger, and the third charging power upper limit value is a sum of charging power upper limit values of the first on-board charger and each second on-board charger; Selecting the minimum value among the initial charging power, the first charging power upper limit value, the second charging power upper limit value, and the third charging power upper limit value as the demand power.

4. The charging method according to claim 2, wherein The charging method further comprises: When the first on-board charger does not receive the first feedback information within a first preset time period after sending the inquiry information, the first on-board charger determines the first charging power according to the demand power.

5. The charging method of claim 2, wherein The determination of the first charging power and the second charging power according to the number and the demand power comprises: Taking the average value obtained by dividing the demand power by the total number as the first charging power and the second charging power, wherein the total number is a value obtained by adding 1 to the number.

6. The charging method according to claim 1, wherein The charging method further comprises: When the first on-board charger receives second feedback information periodically reported by each second on-board charger, it is confirmed that the corresponding second on-board charger is in an online state.

7. The charging method according to claim 6, wherein The charging method further comprises: when the first on-board charger does not receive the second feedback information within a second preset time period after issuing the distribution instruction or receiving the second feedback information, determining that the corresponding second on-board charger is in an offline state; updating the number of online second on-board chargers; returning to the step of determining the first charging power and the second charging power according to the number.

8. An on-board charger comprising a controller, characterized in that, The controller is configured to perform the charging method according to any one of claims 1 to 7.

9. A charging system applied to a vehicle, characterized by, The charging system comprises a vehicle controller and the on-board charger according to claim 8, and the vehicle controller is electrically connected to the on-board charger.

10. An electric motorcycle, comprising: a frame; a body cover arranged at least partially on the frame; a wheel assembly comprising a front wheel and a rear wheel arranged below the frame; a power system arranged on the frame, the power system being in driving connection with at least one of the front wheel and the rear wheel, the power system being configured to provide power for the electric motorcycle, the power system comprising a motor and a power battery; the charging system according to claim 9 arranged on the frame or the body cover; characterized in that the charging system comprises at least a first on-board charger, the first on-board charger being configured to establish a first communication connection with at least a second on-board charger, and the first on-board charger being further configured to: when the first on-board charger receives a wake-up instruction, issuing inquiry information to the second on-board charger, and when the second on-board charger receives the inquiry information issued by the first on-board charger, sending first feedback information to the first on-board charger; when the first on-board charger receives the first feedback information, determining the number of online second on-board chargers according to the received first feedback information; determining a first charging power and a second charging power according to the number, wherein the first charging power is a target charging power of the first on-board charger, and the second charging power is a target charging power of the second on-board charger; the first on-board charger outputs according to the first charging power, and issues a distribution instruction to each online second on-board charger, the distribution instruction comprising the second charging power, and the second on-board charger outputs according to the distribution instruction.

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